7. Un niño tiene 35 kg esta sobre un trineo que tiene una masa de 5 kg. Si el niño y el trineo
1 answer:
Answer:
<em>El niño y el trineo se mueven a 3.61 m/s</em>
Explanation:
<em><u>Energía Cinética</u></em>
Un cuerpo de masa m que se mueve con rapidez v, posee una energía cinética de:
Se nos dice que un niño de 35 Kg está sobre un trineo de 5 Kg y ambos viajan juntos. La masa total del conjunto es m=40 Kg.
Además sabemos que su energía cinética es de 260 J y requerimos calcular su velocidad.
Eso lo haremos despejando v de la ecuación anterior:
v = 3.61 m/s
El niño y el trineo se mueven a 3.61 m/s
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Explanation:
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Answer:
Energy converted =
Explanation:
Recall that Power is the rate at which energy is transferred therefore defined by the mathematical formula:
Since the information on the power of the runner is given, as well as the time the energy conversion takes place, we can then use this equation to find how much energy is been converted. Notice that we just need to change the given time *10 minutes) into the appropriate units (seconds)to get the answer in SI units of energy (Joules). The conversion of 10 minutes into seconds is done by multiplying : 10 minutes * 60 seconds/minute = 600 seconds.
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